A total of 600 new jobs will be announced at the official opening of the headquarters of bookmakers Paddy Power.

The posts, in e-commerce, technology, social media, quantitative research, risk management and online marketing, will support Paddy Power's international online expansion.

The new jobs will be filled by the end of 2015 and based in Power Tower in Clonskeagh, south Dublin. Another 189 employees have been taken on since the beginning of April - an average of 30 new jobs per month.

Taoiseach Enda Kenny said the news highlights the strides Irish companies are taking in e-commerce and technology.

"Paddy Power's announcement shows how Irish companies can embrace change and respond to new opportunities," he said. "I commend the company on its commitment to Ireland and in particular its commitment to retaining and developing Irish graduates."

This will bring the total employment by Paddy Power in Ireland to 2,783.

It is the second big jobs announcement for Ireland this week, after the Kerry Group revealed 800 posts will be created by 2015, and a further 160 when a new plant in Co Kildare is fully operational.

Patrick Kennedy, chief executive of Paddy Power, said: "We are a business born and bred in Ireland and we take pride in continuing to create high quality jobs with the associated economic multiplier effect in this country, particularly given the current economic challenges.

"We welcome the Government's introduction of a licensing regime and commitment to a robust regulatory framework which will sustain and attract investment."

The group revealed strong international online growth in recent years has resulted in four-fifths of its operating profit being generated online last year.